42820412429 has 2 divisors, whose sum is σ = 42820412430. Its totient is φ = 42820412428.

The previous prime is 42820412333. The next prime is 42820412491. The reversal of 42820412429 is 92421402824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39076196329 + 3744216100 = 197677^2 + 61190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42820412429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42820412392 and 42820412401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42820412029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21410206214 + 21410206215.

It is an arithmetic number, because the mean of its divisors is an integer number (21410206215).

Almost surely, 2^42820412429 is an apocalyptic number.

It is an amenable number.

42820412429 is a deficient number, since it is larger than the sum of its proper divisors (1).

42820412429 is an equidigital number, since it uses as much as digits as its factorization.

42820412429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 42820412429 in words is "forty-two billion, eight hundred twenty million, four hundred twelve thousand, four hundred twenty-nine".